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5770 OC speeds

iviv

iviv

iviv

Soldato
Joined
2 Jun 2007
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Mornington Crescent
What sort of speeds are people getting with their 5770's? I'm looking at squeezing some extra speed out of mine, just got the MSI afterburner downloaded, I'm just curious as to what speeds people are getting out of their cards, and what I should be aiming for.

Edit:

weirdness.jpg


Right, the thing's running fine at the usually lowered clocks for desktop application, but that sudden drop there is when I increase the clock speed? It drops the idle clock speeds right down? They come back up when under use, but still, that's a little annoying, as its making windows rather laggy. Is there any way around this?

Also, how hot can I let this card get? Its a very hot day here at the moment, about 25C outside, so even with this small overclock I'm hitting 75C on the GPU after 5 mins of stressing it with ATI Tool's artifact scanner, fan speed up to 46%.
 
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Mine went to 930/1370 stable, just remember that it will vary from card to card. A few brands allowed the increase in vcore which would help further overclocking perhaps.

I think they are pretty good overclockers, I don't particularly like how they lower the core/memory hz when in 2D mode either as I felt It too. But I guess this is how they go about saving idle wattage power. I think also the vcore decreases in 2d mode.
 
The thing is, they idle at 400/1200, but when applying any overclock the idle speed drops to 157/300

Is this a driver issue, or something that's likely to be fixed? I think I may just create a couple of profiles, one with the stock values and one for gaming. How hot can I let it go safely?

Edit: 930/1350 for 5 mins and its sitting on 75C.
 
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950/1400 lead to mega graphics corruption the second I started ATI Tools scanning, hit the reset button on my case and it said I'd bluescreened, so I guess that was a little too far :p
I'll try shorter steps, since the temperature wasn't an issue. I'm guessing it needs more volts, and that's not something I can change on a sapphire 5770, is it?
 
iviv said:
950/1400 lead to mega graphics corruption the second I started ATI Tools scanning, hit the reset button on my case and it said I'd bluescreened, so I guess that was a little too far :p
I'll try shorter steps, since the temperature wasn't an issue. I'm guessing it needs more volts, and that's not something I can change on a sapphire 5770, is it?
Click to expand...

When I overclock I go up in increments of about 10mhz, its extremely painful and a little time consuming but its better than bricking your card :D

I followed this guide

http://www.overclock.net/ati/633816-how-overclock-your-ati-gpu.html

this includes some overclocks

http://www.overclock.net/ati/598020-club-5770-a.html
 
Core clock 940, errors/artifacts in GPUTool at 945.

Get some screen tearing at 1400 memory clock, though the render test seemed fine, so took it back to 1390.

Testing 940/1390 still game some occasional screen tearing, temps are stable at 69C and its hot weather, so its just not getting enough volts, I guess, and its not something I can change on a sapphire card, is it?

Anyway, 940/1385 seems to be stable. Now to run some benchmarks and see how much this actually means in real terms :D

3dmark GPU and the GPU tests just ran mostly fine, GPU score 7787.
Only issure really was the loading screens, there was quite a bit of tearing, but that was purely due to the card repeatedly switching between 157 and 940 clocks, not really much I can do about that though. Still, I'll give it a try in a couple of games, see if its completely stable now.

beforeic.jpg
afterfw.jpg


2.2fps gained in heaven, not too bad.
 
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I just got an engineering sample, it has 5 dip switches on the back, do you think they could be for voltage? I've looked around and it's been noted the engineering ones have this, but nobody seems to have tried them out. I'm not willing to ruin the card by messing with it either though really, just wondered if anyone knew.
 
iviv said:
3dmark GPU and the GPU tests just ran mostly fine, GPU score 7787.
Only issure really was the loading screens, there was quite a bit of tearing, but that was purely due to the card repeatedly switching between 157 and 940 clocks, not really much I can do about that though. Still, I'll give it a try in a couple of games, see if its completely stable now.
Click to expand...
Tearing could be (mostly) caused by memory clock or shader clock (can't be adjusted for ATI card I think) being too high...may be you should try lowering the memory clock to something like 1200 to check if the tearings still occur? If there's no tearing, then you probably would need to work down a bit on the memory clock from 1385.
 
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Marine-RX179 said:
Tearing could be (mostly) caused by memory clock or shader clock (can't be adjusted for ATI card I think) being too high...may be you should try lowering the memory clock to something like 1200 to check if the tearings still occur? If there's no tearing, then you probably would need to work down a bit on the memory clock from 1385.
Click to expand...

Thing is, the only time it happens is when the card is quickly switching between speeds, which happens during level loading for games, the GPU is only slightly getting stressed, so it keeps ramping the clocks up and back down again, causing the tearing. It normally doesn't happen, but any overclock seems to set the idle clocks down to 157/300 or something silly, which is barely enough to deal with Aero. In game, once the clocks are sitting on their high values everything is super smooth.
 
Right, this is a fairly major issue. I've been playing TF2 with stock clocks, I can max TF2 out so no point playing it with an overclock, and both times its crashed. Now, its been about 30-60 mins into the games, both times were complete freezes, no bluescreen/error, though the second time blasted an extremely loud high pitched noise through my headphones and almost deafened me :x

Since I'm not even using an overclock, I'm playing at stock speeds, it can't be that, but the game was working fine before I started overclocking, so one is lead to believe that the issue has to have been something I've done... but what? I can't touch card voltages, the card always ran <70C under clocks so it can't have been damaged like that... or is this just a mega coincidence?
 
I remember reading a fix somewhere for the 157/300 clocks problem. You simple created a profile and stopped it dropping so low. THis worked for me when using a single 5770, now I have 2, does anyone know if I have to do any different in the profiles to stop the cards clocking down so much? If I set the profile, will both cards clock to the same all the time? Thanks
 
I had mine at 1000/1400 but because I have 2 MSI hawks and all the hot air stays in the case my PC got too warm and noisy.

I clocked down to 900/1300 and I notice no difference in FPS really and only a small decrease in benchmarks. So overall I decided to stick with lower clocks.
 
Also, underclocked cards to 157/300 wont affect "lagginess" in windows lol. super smooth here with 100 instances of firefox and several HD movies in flip 3d. It must be something else.
 
No, but im sure the clocking down to 157/300 caused the massive problem with the driver display, "The display driver has stopped working and has successfully recovered" or something like that. WHen I changed the base clock to 400, I didnt have any problems at all with drivers.
 
My 5770 idles fine at 157/300 in windows and shuts my secondary card down completly when not in 3d. It must be some other issue driver or hardware.
 
I havent had a problem since going crossfire, it was only when using a single 5770 I had problems due to 157/300
 
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